Iceberg A-81 don travel from Antarctica toward South Georgia, where shallow ground under the sea appear to slow am down. NASA Earth Observatory report the development October 27 with Terra satellite picture wey dem take one week earlier. Na update on the iceberg journey, no be announcement say e just break from Antarctica.
A-81 separate from Brunt Ice Shelf in January 2023. At that time e cover about 1,550 square kilometres. E spend more than three years moving through Weddell Sea, reach northern end of Antarctic Peninsula in May 2026, then continue through Scotia Sea toward the island for South Atlantic.
By late October, the iceberg dey near South Georgia, far from the ice shelf wey produce am. Specialists wey NASA cite observe say movement slow and e appear to dey touch the island underwater shelf. One satellite image fit show position and shape, but scientists need several observations to understand movement.
Ground under water matter because plenty of iceberg body dey below surface. Shallow shelf fit interrupt journey wey look clear if person only look from above. South Georgia don delay other large icebergs before, including A-23A, wey get stuck for shallow ground in 2025 and later break apart.
Even how A-81 form take long time. One big crack for Brunt Ice Shelf remain fairly stable for decades before e start grow again, but final separation still take years. Calving, when ice break away, na normal part of ice-shelf life. One break alone no automatically prove one particular cause.
Scientists still dey monitor Brunt and icebergs wey leave am because the shelf don produce several big pieces and e support important research station. For A-81, next question na how changing shape, sea currents and ground below go affect the journey. October picture capture one moment inside story wey still dey continue.